@import "variable.less"; // Variable.less

.is-invalid {
  .form-control {
    border-color: @danger;
  }
}

.invalid-feedback {
  color: #ef5350;
  display: none;
  margin-top: 0.25rem;
}

.is-invalid .invalid-feedback,
.is-invalid .invalid-tooltip {
  display: block;
}